Attachment for valve mechanism



G. T. SHEARER.

ATTACHMENT FOR VALVE MECHANISM.

APPLICATION FILED 050.6.1918.

1,363,060. Patented Dec. 21, 1920.

George T. Shearer.-

UNITED STATES PATEN OFFICE.

ATTACHMENT FOR VALVE MECHANISM.

Specification of Letters Patent.

Patented Dec. 21, 1920.

Application filed December 6, 1918. Serial No. 265,532.

To all whom it may concern:

Be it known that I, GEORGE T. SHEARER, a citizen of the United States, residing at lVaynesboro, Franklin county, and State of Pennsylvania, have invented and discovered certain new and. useful Improvements in Attachments for Valve Mechanism, of which the following is a specification.

The object of my said invention is to provide an attachment for valve mechanism for internal combustion engines, especially en gincs for automobile use, whereby the joints between the operating parts are kept under tension, and rattle and noise incident to wear resulting from operation and heat is obviated, and the lost motion taken up, thus insuring a quieter operation of the parts, and also resulting in prolonging their life and usefulness, all as will be hereinafter more fully described and claimed.

Referring to the accompanying drawing which is made a part hereof and on which similiar reference characters indicate simi lar parts, the single figure is a view illustrating one set of elements with which my attachment is used, including the valve, valve stem, operating cam, operating lever, etc.

In said drawing, the portions marked 10 indicate the valve stem, 12 the cam shaft, 13 the cam, 14 the connecting rod, and 15 the operating lever.

These several parts are in main of a common construction and arrangement and require no special description.

The cam shaft 12 operates through the cam 13 and rod 1 1 to raise one end of lever 15 and depress the other end, which bears upon the upper end' of valve stem 10, to open the valve in the regular course of the operation of the engine, as is usual. The upper end of rod 14 is connected to lever 15 by a ball and socket joint. A spring 16 is mterposed between the upper end of the valve cage 17 and a member 18 on the upper end of valve stem 10, which normally keeps the valve 19 seated.

My said attachment consists of a spring 20 secured at one end in the pin 21, on which lever 15 rocks, and at its other end is secured to the outer end of lever 15, as at the point 22.

The tension of said spring is directed to raise lever 15 at its end adjacent valve stem 10 and depress rod 14, thus keepingall of the joints between said parts under tension, including the bearing between lever 15 and the pin 21. By this means all lost motion between the parts is taken up and any rattle or noise resulting therefrom prevented.

It will be understood, of course, that the particular form of spring 20 shown is not essential, and that other forms and arrangement may be utilized without departing from my invention. For example, I have illustrated, by means of dotted lines, another form of spring 25, the end of which is secured under a bolt-head 26 on the top of the frame with its outer end attached to substantially the same point as shown for spring 20.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent is:

1. The combination with a valve stem, a fulcrumed rocker arm disconnected therefrom but tapping thereon, of a spring con nected with the fulcrum and provided with an upwardly disposed curve terminating in a hook hooked under the rocker arm adjacent its point ofcontaet with the valve stem and between the point of contact and the fulcrum.

2. The combination with a valve stem, a fulcrumed rocker disconnected therefrom but tapping thereon, a pin upon which the rocker is mounted and about which the rocker rocks, of a spring connected to the said pin and provided with an upwardly disposed curve terminating in a hook adapted to be hooked under the rocker arm adjacent its point of contact with the valve stem and between the point of contact and the fulcrum.

In witness whereof I have hereunto set my hand and seal at Washington, District of Columbia, this fourth day of December, A. D. nineteen hundred and eighteen.

GEORGE T. SHEAR-ER.

FL. s1 

